Bending-brake



Patented July 20, 1920.

2 SHE ETSSHEET l.

H. C. DREIS.

BENDING BRAKE APPLICATION FILED SEPT. 22, 1919 R 3. Wjf ggs hwemor:

I Herman 017F625,

H. C. DREIS.

BENDING BRAKE.

AIPPLICATION FILED SEPT.22, 1919.

. 1,347,474. Patented July 20, 1920'.

2 SHEETS-SHEET Z.

[ZZZ/672K197? Herman 0. 112x925,

HERMAN C. DREIS, OF CHICAGO, ILLINOIS.

BENnIivG- RAKE.

Specification of Letters Patent.

Patented July 20, 1920.

Application filed September22, 1919. Serial No. 325,439.

To all whom it may concern Be it known that I, IIERMAN O. DREIS, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bending-Brakes, of which the following, when taken in connection with the drawings accompanying and forming a part hereof, is a full and complete specification.

This invention relates to brakes used for bending sheet metal. Among the objects of the invention are to obtain a bending brake in which the bed, the upper jaw member, and the apron, respectively, will not bend or givewhen put underheavy pressure, as in the bending of a comparatively thick sheet of metal, or a long one, to insure a straight line to said bend.

A construction whereby the objectssought by me are obtained is illustrated in the drawings referred to, in which- Figure 1 is a perspective of a brake embodying the invention; 7

Fig. 2 is a front elevation of the apron of the brake illustrated in F ig. 1.

Fig. 3 is an elevation of the lower edge of one end of said apron.

Fig. 4 is a vertical sectional v ew on an enlarged scale, of a portion of theapron,

the lower andthe upper jaw of the brake;

- and Fig. 5 is an elevation on line 55 of Fig. 4, viewed in the direction indicated by arrows. 7 a

A reference character applied to designate a given part indicates said part throughout, the several figures of the drawings wherever. the same appears.

A represents the ends or standards of the brake; and B the lower jaw, (see Figs. 4 and 5). C represents the apron; and D the upper jaw.

The lower jaw, (Figs. 4: and 5), comprises a floating member, having the horizontal part I), and the vertical part 6 hereinafter termed floating plates, that being the trade name by which they are known, which in the construction illustrating the invention, are joined by the angle iron E and bolts 6, e. F represents the bar which forms the gripping member of the lower jaw. is joined to the members 6, 5 as by said bolts 6, 6 The lower jaw also comprises the plates G, G which are connected or joined Z2 is maintained standards A, the ones are illustrated in Fig. 5' being A, A, in the ordinary way,

Member F together by angle iron H and bolts h, it. Plate G is rigidly secured to the ends or standards A, by'bolts g, g, and the vertical plate (i is also rigidly secured to said standards by bolts g 9 The floating plate in spaced relation to plate G by blocks I, I, which are held in corresponding recesses in said plates 3) and G, and

7 bolts J, J, and the floating plate 6 is maintained in similar spaced relation to vertical plate 5 by blocks I I and bolts J J Blocks I, I, and I P, are disposed or positioned between plates 6, G, and b at a distance from the ends and sides of plates 6, 6 respectively, which permits said ends and sides to move, under pressure, relative to the plates 6 and G said position corresponding to the position of said blocks in the upper jaw and apron, as illustrated in *ig. 1. The ends of said plates Z), 6 do not extend to the ends of plates Gr, G or to the of said ends which designated by the reference character X, X. I

he upperijaw, D, comprises ends K, K, which are adjustably mounted in standards as by pin L in slot'Z of member M; the plates N, N, which are secured to said ends, as by bolts n, a; and to each other, at the meeting sides or edges thereof, by angle iron 0 and rivets O O ;'the floating plates P, P the blocks I, I and bolts J, J Blocks I, I and bolts J, J maintain members P, P hereinafter termed floating plates for the reasons given relative to members I), b in spaced relation to plates N, N, in a corresponding manner to the maintenance of plates 6, I), to plates G, F represents the bar which forms the gripping member of the upper, and said bar is rigidly attached to plates P, P.

Apron C comprises ends Q, Q, which are pivoted on fulcrums g, g, in the ordinary manner, the plate R, which is secured to said ends Q, Q, as by bolts 1', r, and the member R hereinafter termed a floating plate for the reasons, given relative toplates b, b and P, P the blocks I I and boltsJ J Blocks I I and bolts J J maintain floating plate R in spaced relation to plate R, in a corresponding manner to the maintenance of plates 6, 6 to plates G, G.

By the hereinbefore described construction of the upper and lower jaws, and of the apron, of the brake, a'plate, as Y, Fig. 1, is

' several Supporting members G, G N, N

' firmly gripped and held, throughout its entire length, by the gripping members F, F,

of said jaws; the pressure applied to said gripping bars being transmitted to the floating plates 5, b of the lower jaw and P, PV

of the upper'jaw; and by said floating plates, (through blocks I, I transmitted to the plates G, G and N, N and the bend made to said plate Y upon turning the apronon its fulcrums q, q, is on a straight line, or (in case a comparatively thickplate relative to the size of the brake is bent), on a substantially straight line. i r V The pressure received and transmitted by the several blocks I, I is received by the equally; so that said blocks on a given suptially the same plane, and what are hereinbefore termed the floating plates are thus, respectively, supported a'pluralityi of blocks which are, as stated, in substantially the same plane, said floating plates, being so supported "at predetermined distances from the ends thereof and .in a plurality of places (and not midway thereof), the pressure applied thereto is distributed over com- )aratively small areas, relative tothetotal .area' of the'plates, thus effecting, as stated slight deflection of said plates'fromatrue plane. 'j i r V p The operation of the brake is similar to the operation of brakes heretofore made,

except so far as setforth in the preceding I paragraph. i

I claim:

"1 1. In a bending brake, an apron consisting Vwith aplate arranged to form a supporting membersecurcd at'its ends'to'said endfmembers, an additional platemember, and means,- between the ends thereof, to support said additional member in spaced relation to said supporting member.

2. In a bending brake, an

lower aw,i-andan apron, respectively comprising a plate arranged to forma supportmg memben'andmeansto support the'ends of'said supporting member, said means in 1 said apron consisting of pivoted end members, .in combination with an additional plate member, and means positioned between the ends of said additional member tosup port itin spaced relation to said supporting member. r

f The combinationof a plate supported atzitsends, an additional plate, said plates respectively provided with: a plurality 'of porting member are, at all times, in substanof'pivoted end members, in combination- Peerv a a oppositely positioned recesses between the ends and the transverse central lines-thereof, blocks in saidrecesses arranged to position said plates in parallel planes and in spaced relation, means to maintain said plates as positioned, said meansadapted to permit variation in-said spaced relation,;and means to apply pressure to said addltlonal plate.

1 4. The 'coinbinationof a plate rigidly secured in a horizontal plane at its ends'to a standard, a standard, an additional plate,

said plates provided with a plurality of recesses between the ends and the transverse central lines thereof, blocks in said recesses, and means to maintainsaid platesin parallel planes and in spaced relation with said blocks interposed between them, said additional plate movable independently of the movement of said first named plate to vary said spaced relation, and means to apply pressure to said additional plate.

5. Plates,'means to support said' plates at the ends thereof, said plates joined at meeting sides, in combination with, additional plates and' means to maintain said addi tionalplates in spaced relation to said first named platesv and in parallel planes, said means includingblocks between said additional and first named plates, and bolts, said bolts being adapted and said blocks being positioned to permit said additional plates to move relative to said first named plates and independently thereof upon pressure being applied to said additionalplates,

6.- In a bending brake,ian upp er and a lower jaw, respectively comprising a hori-' zontal and an additional'plate joinedat' the meeting sides thereof, said joining including angle irons and bolts, means to support the ends of said plates, additional plates secured to said first named plates in spaced relation thereto and free to move independently thereof to vary said spaced relation, and

gripping members attached to said additional plates, 1n combination wlth an apron fulcrumed on said supporting means, said apron comprising a plate, fulcrumed members, said plate and said fulcrumed mem bers rigidly secured together, and an additional plate secured in spaced relation to said rigidly secured plate an'd free to move independently thereof to vary said spaced relation. N

7. In a bendmg brake, an upper and a 7 lower aw, respectively including a horizon- 'tal and an additional plate, means to join said plates at the meeting edges thereof,

saidmeans including angle irons and bolts, and means to support said plates at the endsthereof, additional-plates, all 'said'plates respectively provided with recesses, blocks and bolts,saidblocks positioned in said recesses, and said blocks and bolts arranged to Imamtam said addit onal plates in spaced relation tosaid firstnamedplates and free to' move independently thereof to vary said spaced relation, and gripping members attached to said additional plates, in combination with an apron fulcruined on said means to support, said apron including a plate, fulcrum members, said plate and said fulcrum members rigidly attached together, an additional plate, blocks and bolts, said blocks and bolts arranged to secure said additional plate to said rigidly secured plate in spaced 10 relation thereto and free to move independently of a bend therein to vary said spaced relation.

HERMAN C. DREIS. Witnesses CHARLES TURNER BROWN, B. S. BROWN. 

